[chef] Re: Re: Re: RE: RE: Re: Upgrade Ubuntu from 12.04 to 14.04

[niristotle okram < >]

"Never ever ever do in-place OS upgrades. Ever. This is sysadmin-101 qualification exam level stuff." .. hmmm interesting but haven't came across this in any form.

For  the main question, "I need to upgrade couple of my servers which are deployed through Chef, from Ubuntu 12.04 to 14.04. I have both 12.04 and 14.04 packages on my repository." - i would chef out a test nodes and try upgrading them and see how it goes before i draw any conclusion on what best to do the job. Ubuntu have a neck of upgrade failures in some way or other 

 

On Mon, Apr 27, 2015 at 1:27 PM, Sean OMeara < " target="_blank"> > wrote:

Never ever ever do in-place OS upgrades. Ever.

This is sysadmin-101 qualification exam level stuff.

Best case scenario, you end up with a machine in an unknown state,
where you find oddly broken things months down the line.

Worst case scenario, you lose your data. I had one incident Long Ago
(sarge to etch?), where a kernel update caused the PCI bus to scan in
the opposite direction, corrupting the software raid.

Re-baseline your machines in a test environment.

-s

On Mon, Apr 27, 2015 at 4:21 PM, Jason J. W. Williams
< "> > wrote:
> On Mon, Apr 27, 2015 at 1:12 PM, Mohammad Fattahian
> < "> > wrote:
>> Understood. BTW is there any way to upgrade OS via Chef? Our recipes are not
>> that much OS oriented. I hope I can do an upgrade via Chef. Also we don’t
>> have enough resources to recreate the servers with 14.04 from scratch.
>
> I'd recommend investing your resources into making your cookbooks able
> to reprovision the servers from scratch rather than in trying to make
> Chef handle your Ubuntu upgrade. In my experience upgrading Ubuntu (or
> any distro) is asking for trouble later from mismatched dependencies
> and other driftwood left behind. Also, if your cookbooks can bootstrap
> a server from a base OS install, you'll be able to recover from server
> failures as an extremely useful benefit.
>
> We recently went through upgrading our cookbooks to be 14.04 friendly,
> which was relatively minimal effort.  Then we just provisioned new
> servers one at a time and took down the old ones.
>
> -J

--

Regards
nirish okram